2005 passat diesel, viper 791
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=108611
Printed Date: July 05, 2025 at 5:02 PM
Topic: 2005 passat diesel, viper 791
Posted By: johnwgy
Subject: 2005 passat diesel, viper 791
Date Posted: November 02, 2008 at 7:57 AM
Trying to add remote start to 2005 diesel passat.Alarm is a Clifford 881.Does anyone know the wires for the wait to start light and also for the tach as diesels don't have coils to hook to?
Replies:
Posted By: i am an idiot
Date Posted: November 02, 2008 at 10:20 PM
Does the alarm not have a Diesel Mode? This provides a programmable delay for a diesel vehicle. Does the car have a dash mounted Tachometer? I can find NO INFO on the diesel model. If it has a tach, there will be a suitable wire there. Set your meter to AC Volts, ground one lead and probe the wires that could go to the tach, it will have a reading that will increase with the increase of RPMs of the engine.
Posted By: johnwgy
Date Posted: November 03, 2008 at 8:00 AM
As far as I can see the Clifford 881xp does not have a diesel timer mode,it supplies a wait to start wire for diesel use.The wires from the tach are very well bundled,I'm sure with time I could find the wire by trial and error but it would be more practical if I knew which wire to tap into and the best place to find it.
Posted By: ckeeler
Date Posted: November 03, 2008 at 11:37 AM
use a DEI 528T for the wait to start and program your unit for voltage sense.
Posted By: howie ll
Date Posted: November 04, 2008 at 6:17 AM
You should be able to set a Clifford alarm to diesel and then adjust the delay time, don't need glow plug, also use a DEI inductive tach generator to give you tach, it's far safer.
Posted By: johnwgy
Date Posted: November 08, 2008 at 12:28 PM
I managed to get my viper 791 into arm only mode while trying to program.It will not unlock now using either lock or unlock button.How do I reset back to default or get out of this mode,everytime I open the door and turn the ignition on to try and enter program mode my siren is going off as the alarm is constantly on with no way to disarm it?
Posted By: johnwgy
Date Posted: November 08, 2008 at 2:22 PM
Okay,I figured it out.Thanks for looking.
Posted By: johnwgy
Date Posted: November 09, 2008 at 7:28 AM
I'm installing a viper 791 into a 2005 passat.I used the DEI wiring charts and have found the required wires.The DEI chart lists all the triggers as negative - . When I test the wires with my meter I get 0 volts with the doors closed and 12 volts with the doors open. Reading the alarm basics section if I get 12 volts with the door open it is a positive trigger. Why does the DEI chart list these as negative triggers. What wire do I connect to at the alarm,the negative or positive trigger wire.
Posted By: howie ll
Date Posted: November 09, 2008 at 7:40 AM
What you get with your DMM is correct, since when the doors are closed those contact wires are sitting on 12volts from the dome lamp(s), their grounding path throught the door contacts is open circuited. As soon as you open a door the circuit is completed. Thus neg. door contacts. N.B. If yoyur dome light goes out immediately you use the factory remote locking the vehicle, go to the lead on the dome light, AKA dome light supervision for your door contact it's all you need. You will need to diode block hood and trunk inputs because of the sleeper circuits.
Posted By: johnwgy
Date Posted: November 09, 2008 at 8:19 AM
Okay so negative trigger,connect to negative trigger wire from the alarm.
Posted By: howie ll
Date Posted: November 09, 2008 at 8:23 AM
Green wire on alarm. Rolls Royce, some US Fords, Euro Ford Puma trunk contact and trunk contact on some 5 & 7 seies BMs in the early 90s. All else NEG
Posted By: johnwgy
Date Posted: November 29, 2008 at 9:49 AM
I have a 2005 vw passat and am installing a viper 791 with a CAN1. If possible I would like to wire this combo up to allow the factory remote to control the viper arm/disarm as well.Is it correct that I just connect the viper light-GREEN/ black (-) factory alarm disarm directly to the CAN1 blue/white (-)disarm output. Viper GREEN / WHITE (-) factory alarm rearm directly to CAN1 GREEN / WHITE (-)arm output.
Posted By: johnwgy
Date Posted: December 04, 2008 at 9:00 AM
On the viper remote start heavy gauge relay satellite what is the RED / white wire for.Does it need to be connected as well as the red's . I assume if it is needed then just connect it to the red's.
Posted By: moonliter
Date Posted: December 04, 2008 at 9:22 AM
If you are going to use the pink/white for second ignition or accessory then you need to connect the RED / white to the constant 12 volt as simple as that.
Posted By: johnwgy
Date Posted: December 04, 2008 at 5:33 PM
I'm about to hook up a viper 791 to a diesel.I have the DEI pulse timer which will be hooked to the wait to start wire of the alarm.Just how does this wait to start wire work. I would imagine the remote start would operate as soon as the button is pushed on the remote unless a wire is cut on the relay harness, then the wait to start wire would kick in after the set length of time from the timer. Which wire needs to be removed to prevent instant starting,there is no mention in the manual that I can find.
Posted By: t&t tech
Date Posted: December 04, 2008 at 5:57 PM
it has to be programmed when the install is finished. ------------- COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF.
PSALMS 37:5
Posted By: johnwgy
Date Posted: December 04, 2008 at 7:01 PM
That was my first thought but I can't find anywhere in the programming instructions that would allow for the wait to start. The timer I'm using is the DEI528T.
Posted By: JWorm
Date Posted: December 04, 2008 at 9:03 PM
Is it a recent 791xv, or an older model? With recent models (made in 2005+) you don't need the 528T. You program option 3-13 to a timed setting. Older models don't have that option and you need a 528T.
Posted By: johnwgy
Date Posted: December 04, 2008 at 9:18 PM
Older model without built in timer.
Posted By: johnwgy
Date Posted: December 05, 2008 at 12:00 PM
I'm still trying to understand the proper operation of the wait to start wire. It either is fed a constant ground which is broken after 528 timer times out or it receives ground after the timer times out. The timer can be configured either way. It would seem to make sense that a constant ground to the wait to start wire would perhaps prevent remote starting till the ground is removed by the timer? If the wire works opposite and requires ground to start then something must have to be disconnected or the remote start would operate as soon as the button is pushed as the wait to start wire would see nothing just as if it wasn't connected at all.
Posted By: ckeeler
Date Posted: December 05, 2008 at 5:25 PM
The 528T provides a ground from term 87 to the wait to start input on your unit. you need to trigger the BLACK/ white wire on the 528t with the status output, or ground when running wire. after it times out the ground goes away and the remote start powers the start wire.
Posted By: johnwgy
Date Posted: December 05, 2008 at 7:17 PM
That's the only way I can see how the wait to start can operate.However the instructions included with the 528 show the Brown 87 as "normally open" wire connected to the wait to start. Wouldn't this be the opposite effect, when triggered by the black'white the relay would close creating the ground.
Posted By: ckeeler
Date Posted: December 05, 2008 at 7:26 PM
look at a relay. 30 and 87a are normaly closed. 30 and 87 are normaly open. 30 and 87 close when the relay is energized. put a ground on 30......and voila, when energized 87 will see a ground. and in the case of the 528T 87 will see ground until it times out, thus the remote start unit waits to send voltage on the start wire until that ground on the wait to start wire is gone.
Posted By: johnwgy
Date Posted: December 05, 2008 at 7:40 PM
Okay, got it. I wasn't taking into account that the relay was ENERGIZED creating the ground . Makes total obvious sense now, I feel kind of stupid. Thanks ckeeler.
Posted By: ckeeler
Date Posted: December 05, 2008 at 7:43 PM
no problem. and dont worry either, those instructions on the 528T are as clear as mud arent they?
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